Duncan ( of the United States)

Also known as UALP 31, 7937

Where: Greenlee County, Arizona (32.7° N, 109.1° W: paleocoordinates 32.8° N, 108.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Gila Conglomerate Formation, Blancan (4.9 - 1.8 Ma)

• 4 localities in about 3 m, additional locality almost 10 m lower

• member-level stratigraphic resolution

Environment/lithology: lacustrine; marl and claystone

• most localities are shown as coming from marlstone or claystone

Size classes: macrofossils, mesofossils

Collection methods: bulk, surface (float), sieve,

Primary reference: Y. Tomida. 1987. Small mammal fossils and correlation of continental deposits, Safford and Duncan basins, Arizona. National Science Museum 1-141 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 19654: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Richard Hulbert and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

 Accipitriformes - Accipitridae
Amplibuteo concordatus2 Emslie and Czaplewski 1999 hawk
south locality, west of Railroad Wash
 Rodentia - Cricetidae
? Bensonomys sp.1 Gazin 1942 mouse
Reithrodontomys rexroadensis Hibbard 1952 harvest mouse
"Sigmodon medius" = Sigmodon minor Gidley 1922 cotton rat
UALP 7937: Mezzabotta 1997
Neotoma fossilis Gidley 1922 pack rat
Ondatra sp.1 Link 1795 muskrat
Ophiomys cf. taylori Hibbard 1959 vole
Peromyscus hagermanensis Hibbard 1962 deer mouse
"Baiomys minimus" = Peromyscus minimus Gidley 1922 deer mouse
UALP 7937: Mezzabotta 1997
 Rodentia - Geomyidae
Nerterogeomys cf. persimilis1 Hay 1927 pocket gopher
 Rodentia - Heteromyidae
Perognathus gidleyi Hibbard 1941 pocket mouse
 Lagomorpha - Leporidae
 Perissodactyla - Equidae
Nannippus peninsulatus1 Cope 1885 hipparionine horse
Equus sp. Linnaeus 1758 horse
 Tribosphenida - Soricidae
Sorex sp. Linnaeus 1758 long-tailed shrew
Notiosorex sp. Baird 1877 gray shrew
 Carnivora - Canidae
Chrysocyon nearcticus n. sp.4 Tedford et al. 2009 maned wolf
 Carnivora - Felidae
Felinae indet.1 Trouessart 1885 cat
 Carnivora - Hyaenidae
 Proboscidea - Gomphotheriidae
Stegomastodon mirificus Leidy 1858 gomphothere
 Ungulata - Tayassuidae
Platygonus sp. Leconte 1848 peccary
 Ungulata - Camelidae
Camelops sp. Leidy 1854 camel
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Ungulata - Cervidae
Odocoileus sp. Rafinesque 1832 New World deer
 Ungulata - Antilocapridae
cf. Tetrameryx sp. Lull 1921 pronghorn